1, gold identification. When buying precious metal jewelry such as gold and silver, don't blindly believe in the ultra-high gold content advertised by merchants, just look for "pure gold". 2. Check the texture carefully. Color: Gold shows different colors due to different kinds and components of impurities. Gold is red and yellow with a fineness of over 95%. Yellow, fineness of about 80%; It is bluish yellow, about 70%; Yellow is slightly gray, about 50%. Weight: specific gravity of gold 19.3g/cm3, containing pure gold and soft. It is generally not used for inlaying jewelry. All gold jewelry that emphasizes high-purity inlay generally contains moisture. 3. Be wary of "buying equals earning". Only jewelry that meets the quality and grade standards has the function of preserving and increasing value, and most jewelry is only suitable for daily life to wear or collect.